Why do people believe conspiracies?
The reason is that lots of collusionhas definitely taken place, which could be described as 'conspiracy'.I prefer to describe this as 'collusion', 'cronyism' and'corruption'. Absolutely vast amounts of corruption have taken placethat are part of the historical record. But because we live in aculture in which the prevailing and dominant sources of informationtend to either deflect attention away from this, spin it, or explainit away with disingenuous or specious reasoning, then it's quite easyto feel as if you live in a completely rotten culture. Certainly thatis how I feel about my country, justifiably so.
Some people that feel this way thenperhaps go too far and start to dissect issues that are really, atbest, very difficult to prove. I think the feelings behind it are notnarcissism, as has been suggested here, but actually a good natureddesire to see the world operate in a more equitable and less brutalfashion. It's really not necessary to discuss these issues one way oranother because there is absolutely tonnes of completely provablecorruption that is part of the public record and cannot possibly bedenied.
However, it continues to be very easyto pull the wool over the eyes of the vast majority of people becausevery few people know their own history, and are thus doomed to allowthe establishment to repeat its nefarious conduct over and overagain, while turning up once every few years and voting for mainlineRepublicans / Democrats whatever happens. This could possiblyincrease socially concerned individuals sense of alienation from thecentral culture, and perhaps make them more prone to look into thingswhich don't really stand up to scrutiny.
Of course, we all have our own idea ofwhat the issues which constitue 'conspiracy theories' are, as everyindividual's sense of discernment and perception varies greatly. Some people consider Noam Chomsky to be a conspiracy theorist:
http://oliverkamm.typepad.com/blog/2007/09/tendentious-whi.html
Others probably believe that his work is slightly more valuable than that of the author there, Oliver Kamm.
Ultimately most people don't want to look at evidence and attempt to understand the way the world works, they instead prefer to gain a vague impression of it, concretise it, and then cry and kick and scream when anyone presents any information that conflicts with it, regardless of whether this information is factually accurate. This is equally true of conspiracy theorists, anti-conspiracy theorists, and people who have no interests in them one way or another.